Revert of Changes exception for gyp files to only gyp files in build/...

Revert of Changes exception for gyp files to only gyp files in build/ (patchset #1 of https://codereview.chromium.org/512693004/)

Reason for revert:
I'm reverting this.
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...
should have triggered a compile.

Original issue's description:
> Changes exception for gyp files to only gyp files in build/
>
> I changed analyzer such that if a gyp file (or an included gypi file)
> changes all targets in the gyp file are marked as changed. This means
> I should no longer have to special case gyp files. I'm leaving the
> exception in place for any gyp files in build as any change to those
> really needs to recompile the world.
>
> BUG=109173
> TEST=none
> R=thakis@chromium.org
>
> Committed to pending queue: https://chromium.googlesource.com/chromium/src/+/5110e8b

TBR=thakis@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=109173

Review URL: https://codereview.chromium.org/512303002

Cr-Commit-Position: refs/heads/master@{#292410}

testing/buildbot/trybot_analyze_config.json

 {
   "exclusions": [
-    "build/.*gyp[i]?",
+    ".*gyp[i]?",
     "build/android/pylib",
     "build/compiler_version.py",
     "build/get_landmines.py",